JP2599541Y2 - Automatic transmission control device for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission control device for a vehicle, and more particularly to a device for connecting an engine and a transmission via a mechanical clutch.

[0002]

2. Description of the Related Art As a conventional example of a vehicle automatic transmission control device,
There is one that uses a mechanical clutch instead of a torque converter to connect an engine and a transmission (Japanese Patent Laid-Open No. Sho 62-17).
No. 328). According to this method, a mechanical clutch is turned off (disengaged) by an actuator at the time of a shift switching operation, the transmission is set to a neutral position, and then the shift stage of the transmission is set to a shift stage designated by a shift lever. The mechanical clutch is turned on (connected) to perform a series of shift control.

[0003]

However, in such a conventional automatic transmission control device for a vehicle, the shift control is performed by simply turning on and off the clutch at the time of a shift switching operation. (For example, a desire to perform a speed change operation quickly, slowly, or smoothly) cannot be performed.

Japanese Patent Laid-Open Publication No. Hei 2-8550 discloses an apparatus in which the connection speed of a clutch is changed in accordance with the amount of depression of an accelerator pedal. There is a problem that cannot be performed. The present invention has been made in view of such a situation, and an object of the present invention is to enable an optimal speed change operation that meets a driver's intention.

[0005]

Therefore, according to the present invention, as shown in FIG. 1, an engine A and a transmission B are connected via a mechanical clutch C, and the clutch C is disengaged and then shifted. A shift speed changing means for shifting a shift speed of the transmission B to a shift speed designated by a lever, and thereafter connecting and operating the clutch C; and a change speed detecting means D for detecting a shift change speed of the shift lever.
Clutch operation parameter setting means E for setting at least one operation parameter of the clutch disengagement speed, the engagement speed, and the connection / disconnection timing according to the detected shift change speed; and performing a shift operation according to the detected change speed. A fuel injection amount setting means F for setting the fuel injection amount of the engine, a clutch operation means G for connecting and disconnecting the clutch C according to the set parameters, and an engine A according to the set fuel injection amount. And an injection amount control means H for controlling the fuel injection amount.

[0006]

In the shifting operation, the clutch operation is changed according to the shift speed of the shift lever and the engine fuel injection amount is changed so that the optimum shifting operation according to the driver's will can be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 2, a transmission 3 is connected to an engine 1 via a mechanical clutch 2, and an output shaft 4 of the transmission 3 is connected to a drive axle via a propeller shaft (not shown). The clutch 2 detects whether the clutch 2 is in the connected (on) state or the disconnected (off) state based on the stroke amount.
A clutch position detecting device 6 for outputting an off signal to the control device 5 and a clutch actuator 7 as clutch operating means for operating the clutch 2 on and off are mounted.

The transmission 3 is provided with a gear rotation speed (engine rotation speed) on the engine 1 side based on the rotation speed of the counter shaft.
And a vehicle speed sensor 9 for outputting to the control device 5 a synchro rotation speed related to the vehicle speed based on the rotation speed of the output shaft 4. . The transmission 3 has a shift actuator 10 for switching the shift stage of the transmission 3.
And a shift position sensor 11 that detects the shift position of the transmission 3 and outputs the shift position to the control device 5.

A fuel injection pump 12 for supplying fuel to the engine 1 is provided, and an electronic governor 13 is attached to the fuel injection pump 12. The electronic governor 13 is supplied with a fuel injection amount control signal from the control device 5, and the electronic governor 13
Are output to the control device 5. Here, the fuel injection pump 12 and the electronic governor 13 constitute injection amount control means.

The master cylinder of the clutch pedal 14
The hydraulic pressure is supplied to the clutch actuator 7 from 15, and the clutch actuator 7 is operated by either the signal from the control device 5 or the hydraulic signal from the clutch pedal 14 to perform the on / off operation of the clutch 2. ing. 16 is a reservoir. Further, a detection signal is input to the control device 5 from a sensor as a change speed detecting means for detecting the position of the shift lever 17. As shown in FIG. 6, the sensor includes a neutral position detection switch 21 for detecting a neutral position, a first shift position detection switch 22 for detecting the positions of the shift levers 17 on the R, 2 and 4 stages, and 1, 3 , A second shift position detection switch 23 for detecting the position of the shift lever 17 on the fifth stage, and select position detection switches 24-26 for detecting the position of the shift lever 17 on the select side.

Here, the control device 5 constitutes clutch operation parameter setting means and fuel injection amount setting means. Next, the operation will be described with reference to the flowchart of FIG. S
In step 1, based on detection signals from the detection switches 21 to 26 of the shift lever 17, it is determined whether or not a shift change instruction has been issued. If YES, the process proceeds to S2, and if NO, the routine is terminated.

In S2, the shift change speed of the shift lever 17 is calculated based on the detection signals from the first and second shift position detection switches 22 and 23 and the neutral position detection switch 21. Here, the shift change speed is a speed at which the shift lever 17 switches from a neutral position to a predetermined shift speed as shown in FIG. In S3, a map is used to search for a return speed (return rate) of the fuel injection amount based on the calculated shift change speed. This return speed is set so as to increase as the change speed increases, as shown in FIG.

In step S4, a clutch connection speed is retrieved from a map based on the calculated shift change speed. As shown in FIG. 5, the clutch connection speed is set to increase as the shift change speed increases. In S5, the clutch actuator 7
, And the clutch 2 is turned off by the clutch actuator 7.

In S6, a drive signal is output to the shift actuator 10 so that the shift stage of the transmission 3 becomes the designated shift stage designated by the operation of the shift lever 17 , and the shift stage of the transmission 3 is operated by the shift actuator 10. Is shifted to the designated shift stage. At the time of the shift operation, the fuel injection amount is set to be smaller than the normal injection amount corresponding to the accelerator pedal depression amount (for example, the idling fuel injection amount) in order to facilitate the shift operation. That is,
Set the fuel injection amount at high speed to be lower than the normal injection amount.
The transmission speed when the transmission is in neutral.
Fluctuations are suppressed, and subsequent transmission synchronization becomes easier.
Therefore, the speed change operation can be performed smoothly.

In S7, a drive signal is output to the clutch actuator 7 to turn on the clutch 2, and the clutch 2 is turned on by the clutch actuator 7.
At this time, the speed at which the clutch 2 is moved from the off position to the on position is set to the clutch connection speed determined in S4, and clutch on control is performed. In S8,
A drive signal is output to the electronic governor 13 so as to return the fuel injection amount to the normal fuel injection amount corresponding to the accelerator pedal depression amount, and the electronic governor 13 changes the fuel injection amount supplied to the engine 1 from the fuel injection pump 12 to the normal fuel. Change up to the injection amount. At this time, the fuel injection amount is controlled so as to gradually become the normal fuel injection amount at the return speed obtained in S3.

As described above, the connection speed of the clutch is set to increase as the change speed of the shift lever increases, and the return speed of the fuel injection amount is set to increase as the change speed increases. As a result, the speed change operation speed can be changed and the engine output can be changed according to the change speed of the shift lever operated by the driver's will. For this reason, a smooth shift operation and a start operation without a shock can be performed even if a feeling of acceleration is given from a fast timing or a certain time is required according to the driver's will.

In this embodiment, the connection speed of the clutch is changed in accordance with the change speed. However, the connection speed of the clutch and the connection / disconnection time of the clutch may be changed, or all of them may be changed. Is also good. Further, the connection speed may be changed according to the shift gear designated by the shift lever. FIG. 7 shows a case where the shift instruction by the shift lever is performed by upshifting or downshifting. In this case, a sensor for detecting a change speed is provided by a hold position detection for detecting a hold position for holding the current shift stage. It comprises a switch 31, a shift-up position detection switch 32 for detecting a shift-up position instructing a shift-up, and a shift-down position detection switch 33 for instructing a shift-down. Then, based on the detection signals from the sensors 31 to 33, the moving speed of the shift lever from the hold position to the shift-up position or the shift-down position is set to the shift change speed.

[0018]

As described above, according to the present invention, the clutch operation and the fuel injection amount of the engine are changed in accordance with the shift change speed of the shift lever, so that the optimum shift according to the driver's will is achieved. The operation can be performed, and the driving operability according to the road operation condition can be secured.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to claims of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a flowchart of the above.

FIG. 4 is a characteristic diagram for explaining the operation of the above.

FIG. 5 is another characteristic diagram for explaining the operation of the above.

FIG. 6 is a diagram showing an example of a shift operation of the above.

FIG. 7 is a diagram showing another example of the shift operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Mechanical clutch 3 Transmission 5 Control device 7 Clutch actuator 10 Shift actuator 12 Fuel injection pump 13 Electronic governor 17 Shift lever 21 Neutral position detection switch 22 First shift position detection switch 23 Second shift position detection switch

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02D 29/00-29/06 F02D 41/00-41/40 B60K 41/00-41/28

Claims (1)

(57) [Scope of request for utility model registration] An engine and a transmission are connected via a mechanical clutch. After the clutch is disengaged, a shift stage of the transmission is shifted to a shift stage designated by a shift lever, and then the clutch is engaged. An automatic transmission control device for a vehicle configured to perform a connecting operation, wherein a change speed detecting means for detecting a shift change speed of the shift lever, and a disengagement speed and a connection speed of the clutch are connected and disconnected according to the detected shift change speed. Clutch operation parameter setting means for setting at least one operation parameter with timing; fuel injection amount setting means for setting the fuel injection amount of the engine at the time of a shift operation according to the detected change speed; and the set parameters Clutch operating means for connecting and disconnecting the clutch according to
An automatic transmission control device for a vehicle, comprising: injection amount control means for controlling the fuel injection amount of the engine according to the set fuel injection amount.